Swiss contribution to the IEA HPT Annex 58 HTHP Most industrial process heat is still produced from fossil fuels, but achieving Switzerland’s Energy Strategy 2050 (ES2050) climate goals requires a transition to renewable energy sources. Hightemperature heat pumps (HTHPs), which operate at temperatures above 100 °C, offer an efficient pathway for electrification, particularly for low- and medium-temperature process heat demands. However, adoption has been slow due to economic, technological, integration, and knowledge barriers. The HTHP-CH project addressed these challenges by developing practical guidelines, evaluation tools, and a web-based integration platform to support optimal HTHP implementation in Swiss industry. These solutions were validated through case studies (ELSA Estavayer Lait SA, Cremo SA, Gustav Spiess AG) in processes such as drying, evaporation, and cleaning-in-place (CIP), effectively bridging the gap between theory and practice. The project also contributed to the international IEA HPT Annex 58 project. Through these case studies, the project developed an evaluation tool and produced guidelines to facilitate the practical adoption of synergies relevant to the Swiss industry. Results were disseminated widely via webinars, publications, workshops, and international collaboration with 13 partner countries in the IEA HPT Annex 58. The Swiss project team, comprising OST-IES, EPFL-IPESE, HEIG-VD/IGT, and CSD Engineers, focused on optimizing HTHP integration through industrial case studies, modelling, and practical guidelines. The project evaluated energy efficiency gains, CO₂ reduction potential, and economic feasibility. Close collaboration with Swiss industrial partners ensured the practical applicability of the approach, while national projects provided additional insights into local HTHP integration strategies. A Swiss Market Report was produced, outlining the status of HTHPs in Switzerland, including ongoing research and development, market potential, realized examples, and available funding programs. The report also summarized available HTHP technologies and demonstration cases, highlighting end-user applications in various sectors, including food and beverage, wastewater treatment, electronics, chemicals, pulp and paper, ceramics, biorefinery, and pharmaceuticals. Each case study was presented with visualizations of HTHP integration concepts and technical data. This final Summary Report summarizes the main outcomes of the HTHP-CH project and references several Appendix documents that provide comprehensive insights and additional resources to enhance understanding and application of the guidelines. A compilation of dissemination materials like webinar presentations, workshop results, journal and conference papers, as well as lessons learned from case studies, offers valuable perspectives and facilitates knowledge transfer. Finally, an outlook on possible next steps is provided, outlining potential future areas for further development of HTHP technology and products.